论文部分内容阅读
气缸套是内燃机的一个重要易损件,原来都是使用高磷铸铁等材料制造的,在汽车、拖拉机上装机使用平均寿命仅为15万公里或2000小时左右,与世界先进水平比差距很大。1972年以来,我国一些生产、科研、教学单位,开始研究用硼铸铁做气缸套以提高其使用寿命,目前已取得了可喜的成果。根据在6120、495、490、2125、259柴油机上装机使用证明,使用寿命已达到25～30万公里或4000～5000小时,同时从几年来的试验和批量投产证明,硼铸铁的生产工艺是稳定的,操作并不复杂,废品率低,硼元素立足国内易于获得。虽成本约增加5～6％,但和使用寿命延长给使用部门带来的利益是无法相比的。
Cylinder liner is an important wearing parts of the internal combustion engine, the original is the use of high-phosphorus cast iron and other materials, installed in the car, tractor installed life expectancy of only 150,000 km or 2000 hours, with the gap between the world advanced level . Since 1972, some production, scientific research and teaching units in our country have started to study the use of boron cast iron as a cylinder liner to improve their service life. At present, gratifying achievements have been made. According to the 6120,495,490,2125,259 diesel engine installed on the use of proof, the service life has reached 25 to 30 million km or 4000 to 5000 hours, from several years of trial production and production proved that the production process of boron cast iron is stable The operation is not complicated, the reject rate is low, the boron element is easy to obtain based on the domestic. Although the cost increased by about 5 ~ 6%, but with the extension of the service life to the benefit of the department can not be compared.